A characterization for the dynamic recrystallization kinetics of as-extruded 7075 aluminum alloy based on true stress-strain curves

► The critical strain for DRX initiation was a variable with Z/A. ► A large range of strain, strain rate and temperature were considered. ► We model the DRX kinetics of as-extruded 7075 aluminum alloy firstly. ► Our modeling method has higher operability than optical observation.